Acute epiglottitis though relatively common in pediatric patients as compared to adults, present with almost similar clinical presentations. They include voice change, difficulty or painful swallowing and sometimes with upper airway obstruction. Physical finding of swollen epiglottis is difficult to be obtained owing to the danger of introducing laryngeal mirror into the oropharynx as to avoid contact spasm. The diagnostic thumb sign appearance on lateral neck radiograph is considered pathognomonic of epiglottitis. We report a case of an adult with clinical features and radiological finding of an acute epiglottitis, which did not resolve with antibiotic treatment. Subsequent imaging confirmed the presence of an abscess in the epiglottic mucosa.